feat: multiple hostname routing

[ddevsr]

Description Supersedes #9031

Example

$routes->group('api', ['hostname' =>  ['api.website.com', 'api.website.net]], function ($routes) {
    $routes->get('/', 'Api::royplayer');
});

Thanks to @mrjk990

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [x] Unit testing, with >80% coverage
• [ ] User guide updated
• [x] Conforms to style guide